Your check engine light is on on a 1996 Saturn SC2 and you did a test on it and it said that your system is too rich P0172 How can you fix this problem?
This is caused by your PCM being unable to adapt enough to
correct a problem in the fuel/air mixture. This can be caused by
several things, not necessarily in this order. Catalyst plugged Bad
Powertrain Control Module Engine parts tolerance Fuel injector(s)
stuck open or leaking MAP sensor O2 sensor (upstream) Fuel pressure
regulator Wiring harness/connector problem